The London, Brighton and South Coast Railway (LB&SCR) B2 class was a class of small 4-4-0 steam locomotives intended for express passenger work on the LB&SCR London to Portsmouth line. They were designed by R. J. Billinton and built at Brighton works from 1895 to 1897. They proved to be reliable locomotives but barely adequate for the heaviest trains and acquired the nickname Grasshoppers. As a result the B3 and B2X classes were later rebuilds of these locomotives with larger boilers.